[bkanber]

> use a similar XML format(or any other document markup language) along with a proper scripting language

That's not simple. JSON is simple. Yours is two things, JSON is one thing. And a lot of people are responding positively to this, so the author may be on to something. JSON is NOT the best language for full expressiveness, you're absolutely right about that. But it's simple, it's one single syntax (not two), and it feels like "just configuration" even though you're doing the same amount of logic.

> so optimizing it for displaying documents/interfaces seems futile

I mean, this guy did it, didn't he? And it's open source so now you can too.

I'm glad people build new things. This is cool. Maybe it'll catch on, maybe it won't, but I'm glad he used JSON and not XML+JS. We already have phonegap and cocoon for that ;).